Pump driving mechanism.



No. 877,276. PATENTED JAN. 21, 1908.

' J'. C. WHITMER.

PUMP DRIVING MBGHANISM.

APPLICATION FILED MAY 1, 1907.

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JOHN C. WHITMER, OF LORDSBURG, CALIFORNIA.

BUMP DRIVING MEcHANIsM.

To all whom it may concern.'

Be it known that I, JOHN C. WHITMER, a

citizen of the United States of America, re-

siding. at Lordsburg, in the county ofLos Angeles and State ot California, have invented new and usci-ul Im rovemcnts in Pump Driving Mechanism, o which the -following is a specification.

This invention relates to driving mechanism for double-acting pumps, and is designed as 'an improvement upon the driving mechanism shown in my prior patent N o. 753,771

dated March 1, 1904, the present invention providing a more efficient connection be-vv tween the crank gears and levers to sustain the working strain.

In the accompanymg drawing :-Figure 1.

is a side elevation of the driving mechanism. Fig. 2 is a top plan view thereof. Fig. 3 isa detail section. f i l Referring to the drawing, the numeral 1 designates a frame, on which are eccentrically pivoted I-beam levers 2, pivotally connected at the forward ends of their short arms to the pump rods'3. On the frame is mounted a drive shaft 4, on one end of which is lixed a pulley 5 forconnection with a drive belt. On said shaft are also revolubly mounted pinions 6, which mesh with gear wheels 7 mounted in bearings secured to the frame. These gear wheels, as shown, aire mounted on shafts 8, leach journaled in t'wo bearings S) on the frame, but only one bearing for cach shaft is necessary. These gear wheels carry crank pins 10, which -carry blocks 11,sl1dably engaging the upper heads of the levers, said blocks being provuled with, dovetailcd tongues 12, engaglng under thelateral flanges 13 of said beads. This construction is superior to thatshown in my patent referred to, as the.v I-beam formation of the levers dovetailedl connection between the blocksv and upper danges of said levers insures a stronger construction, truer guid,

ing contact and a firmer coupling engagement to withstand the strain.

It will beobserved that the lat-eral flanges- 13 extend to the outer or free end of the beam 2, and that the inwardly extending,r ton ues 12 of the block are integral with the b ook and are spaced a suicient distance to lie out of contact with the body or web of the beam while forming guide grooves of sufficient width to receive the edges of the flanges.' This construction allowsthe block11 to be readily slipped on and oii the free end of the Specification of Letters Patent. v Appiaaan sea my 1. 1907. seria No. 371.328.

Patentes Ju. a1', 190e.

beam 2 and obviates the necessity of -pro-- viding detachable securing devices toenable the block to be removed and applied and held in rcpxerative position.

. e crank pins are arranged on th'e opposite sides of the gear wheel, so thatin the rrotation of the gears one ,of the levers is at the end of vits upward'moveinent when the other is at the` extreme. limit of its downward movement. The distance from the fulcrum of these levers to the end of the movement of the sliding block" is preferably twice as great esl as the distance'from the fulcrum to where the pump rods are connected. Bv this arrangement, when power is applier. to drive y The downward movement is 'effecteddur.

ing the remainder of the movement of the -crank pin: As the downward movement is accomplished in less time by the slide block coming closer to the fulcrum, at every stroke, both move upward together a short space, thereby always insuring a constant motio 85. in the upward How of water.

Having thus described the invention ,rwhat l lnv a driving mechanism, a frame, two levers pivotally mounted thereon, said levers being of I-form in cross section, reciprocating rods operated by the short arms of the levers, the long arms of said levers having their laterall iianges extending` continuously 'to the free ends thereof, operating gears carrying oppositely arranged crank pins, means for actuating said ears, and blocks carried by said pins, and s iding upon the upper flanges of the levers/said blocks being provided with integral ton es projecting inwardly beneath said upper receiving the same, said blocks being adapted when released from the wrist pins to be slid longitudinally on and ofi said flanges atrthe free ends of the levers. 1

In testimony whereof, I affix my signature "in presence of two witnesses.

E. T. KEIsER, EvELYN Kursen.

anges and forming guide grooves` 

